A touch detection chip may be provided that includes: a drive unit which applies a drive signal to at least two of a plurality of electrodes; a sensing unit which receives a plurality of signals from the at least two of the plurality of electrodes and detects a touch position and a touch pressure; and a plurality of input terminals for receiving the plurality of signals. At least one of the plurality of input terminals is a pressure detection input terminal.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A touch detection chip comprising: a drive unit which applies a drive signal to at least two of a plurality of electrodes; a sensing unit which receives a plurality of signals from the at least two of the plurality of electrodes and detects a touch position and a touch pressure; and a plurality of input terminals for receiving the plurality of signals, wherein the plurality of input terminals comprise at least one pressure detection input terminal for detecting the touch pressure and at least one position detection input terminal for detecting the touch position, the at least one pressure detection input terminal being different from the at least one position detection input terminal, wherein the at least two electrodes to which the drive signal is applied comprise at least one pressure detection drive electrode and n number of position detection drive electrodes, wherein the at least two electrodes for receiving the plurality of signals comprise at least one pressure detection receiving electrode and m number of position detection receiving electrodes, wherein the drive unit applies the drive signal to n number of the position detection drive electrodes during a predetermined time interval and applies the drive signal to the at least one pressure detection drive electrode during the predetermined time interval, wherein the sensing unit comprises an amplifier and a feedback capacitor connected between an output terminal and a negative input terminal of the amplifier, and wherein the sensing unit outputs, during the predetermined time interval, n×m number of touch position data detected from m number of the position detection receiving electrodes and at least one touch pressure data detected from the at least one pressure detection receiving electrode.
2. The touch detection chip of claim 1 , wherein at least one of the at least two electrodes to which the drive signal is applied is a pressure detection drive electrode, and wherein at least one of the at least two electrodes for receiving the plurality of signals is a pressure detection receiving electrode.
3. The touch detection chip of claim 2 , further comprising a plurality of output terminals for applying the drive signal to the at least two electrodes to which the drive signal is applied, wherein at least one of the plurality of output terminals is a pressure detection output terminal for applying the drive signal to the pressure detection drive electrode.
4. The touch detection chip of claim 2 , wherein the pressure detection drive electrode and the pressure detection receiving electrode are the same pressure detection electrode, wherein the sensing unit receives, through the at least one pressure detection input terminal, a signal comprising information on a capacitance between the pressure detection electrode and a reference potential layer, which changes depending on a relative distance between the pressure detection electrode and the reference potential layer spaced apart from the pressure detection electrode, and wherein the drive signal which is applied to the pressure detection electrode passes through a first impedance located between the drive unit and the pressure detection electrode and then is applied to the pressure detection electrode, and wherein the signal which is received from the pressure detection electrode passes through a second impedance located between the sensing unit and the pressure detection electrode and then is received by the sensing unit.
5. The touch detection chip of claim 3 , wherein the pressure detection drive electrode and the pressure detection receiving electrode are the same pressure detection electrode, wherein the sensing unit receives, through the at least one pressure detection input terminal, a signal comprising information on a capacitance between the electrode and a reference potential layer, which changes depending on a relative distance between the pressure detection electrode and the reference potential layer spaced apart from the pressure detection electrode, and further comprising a first impedance between the drive unit and the pressure detection output terminal and a second impedance between the sensing unit and the at least one pressure detection input terminal.
6. The touch detection chip of claim 4 , wherein the first impedance and the second impedance are capacitive components.
7. The touch detection chip of claim 1 , wherein the at least two electrodes to which the drive signal is applied comprise at least one pressure detection drive electrode and n number of position detection drive electrodes (n is an integer greater than or equal to 1), wherein the at least two electrodes for receiving the plurality of signals comprise at least one pressure detection receiving electrode and m number of position detection receiving electrodes (m is an integer greater than or equal to 1), and wherein the drive unit applies the drive signal to the n number of the position detection drive electrodes during a predetermined time interval and applies the drive signal to the at least one pressure detection drive electrode during a different time interval from the predetermined time interval.
8. A touch detector comprising: a drive unit which applies a drive signal to at least two of a plurality of electrodes; and a sensing unit which receives a plurality of signals from the at least two of the plurality of electrodes and detects a touch position and a touch pressure, wherein the at least two electrodes to which the drive signal is applied comprise at least one pressure detection drive electrode for detecting the touch pressure only, and wherein the at least two electrodes for receiving the plurality of signals comprise at least one pressure detection receiving electrode for detecting the touch pressure only, wherein the at least two electrodes to which the drive signal is applied comprise the at least one pressure detection drive electrode and n number of position detection drive electrodes, wherein the at least two electrodes for receiving the plurality of signals comprise the at least one pressure detection receiving electrode and m number of position detection receiving electrodes, wherein the drive unit applies the drive signal to n number of the position detection drive electrodes during a predetermined time interval and applies the drive signal to the at least one pressure detection drive electrode during the predetermined time interval, wherein the sensing unit comprises an amplifier and a feedback capacitor connected between an output terminal and a negative input terminal of the amplifier, and wherein the sensing unit outputs, during the predetermined time interval, n×m number of touch position data detected from m number of the position detection receiving electrodes and at least one touch pressure data detected from the at least one pressure detection receiving electrode.
9. The touch detector of claim 8 , wherein the at least one pressure detection drive electrode and the at least one pressure detection receiving electrode are the same pressure detection electrode, wherein the sensing unit receives a signal comprising information on a capacitance between the pressure detection electrode and a reference potential layer, which changes depending on a relative distance between the pressure detection electrode and the reference potential layer spaced apart from the pressure detection electrode, and wherein the drive signal which is applied to the pressure detection electrode passes through a first impedance located between the drive unit and the pressure detection electrode and then is applied to the pressure detection electrode, and wherein the signal which is received from the pressure detection electrode passes through a second impedance located between the sensing unit and the pressure detection electrode and then is received by the sensing unit.
10. The touch detector of claim 9 , wherein the first impedance and the second impedance are capacitive components.
11. the touch detector of claim 8 , wherein the at least two electrodes to which the drive signal is applied further comprise n number of position detection drive electrodes (n is an integer greater than or equal to 1), wherein the at least two electrodes for receiving the plurality of signals further comprise m number of position detection receiving electrodes (m is integer greater than or equal to 1), and wherein the drive unit applies the drive signal to the n number of the position detection drive electrodes during a predetermined time interval and applies the drive signal to the at least one pressure detection drive electrode during a different time interval from the predetermined time interval.
12. A touch input device comprising: a plurality of electrodes; and a touch detection chip, wherein the touch detection chip comprises: a drive unit which applies a drive signal to at least two of the plurality of electrodes; a sensing unit which receives a plurality of signals from the at least two of the plurality of electrodes and detects a touch position and a touch pressure; and a plurality of input terminals for receiving the plurality of signals, wherein the plurality of input terminals comprise at least one pressure detection input terminal for detecting the touch pressure and at least one position detection input terminal for detecting the touch position, the at least one pressure detection input terminal being different from the at least one position detection input terminal, wherein the at least two electrodes to which the drive signal is applied comprise at least one pressure detection drive electrode and n number of position detection drive electrodes, wherein the at least two electrodes for receiving the plurality of signals comprise at least one pressure detection receiving electrode and m number of position detection receiving electrodes, wherein the drive unit applies the drive signal to n number of the position detection drive electrodes during a predetermined time interval and applies the drive signal to the at least one pressure detection drive electrode during the predetermined time interval, wherein the sensing unit comprises an amplifier and a feedback capacitor connected between an output terminal and a negative input terminal of the amplifier, and wherein the sensing unit outputs, during the predetermined time interval, n×m number of touch position data detected from m number of the position detection receiving electrodes and at least one touch pressure data detected from the at least one pressure detection receiving electrode.
13. The touch input device of claim 12 , wherein at least one of the at least two electrodes to which the drive signal is applied is a pressure detection drive electrode, and wherein at least one of the at least two electrodes for receiving the plurality of signals is a pressure detection receiving electrode.
14. The touch input device of claim 13 , further comprising a plurality of output terminals for applying the drive signal to the at least two electrodes to which the drive signal is applied, wherein at least one of the plurality of output terminals is a pressure detection output terminal for applying the drive signal to the pressure detection drive electrode.
15. The touch input device of claim 14 , wherein the pressure detection drive electrode and the pressure detection receiving electrode are the same pressure detection electrode, wherein the sensing unit receives, through the at least one pressure detection input terminal, a signal comprising information on a capacitance between the pressure detection electrode and a reference potential layer, which changes depending on a relative distance between the pressure detection electrode and the reference potential layer spaced apart from the pressure detection electrode, and further comprising a first impedance between the drive unit and the pressure detection output terminal and a second impedance between the sensing unit and the at least one pressure detection input terminal.
16. The touch input device of claim 13 , wherein the pressure detection drive electrode and the pressure detection receiving electrode are the same pressure detection electrode, wherein the sensing unit receives, through the at least one pressure detection input terminal, a signal comprising information on a capacitance between the pressure detection electrode and a reference potential layer, which changes depending on a relative distance between the pressure detection electrode and the reference potential layer spaced apart from the pressure detection electrode, and wherein the drive signal which is applied to the pressure detection electrode passes through a first impedance located between the drive unit and the pressure detection electrode and then is applied to the pressure detection electrode, and wherein the signal which is received from the pressure detection electrode passes through a second impedance located between the sensing unit and the pressure detection electrode and then is received by the sensing unit.
17. The touch input device of claim 16 , wherein the first impedance and the second impedance are capacitive components.
18. The touch input device of claim 12 , wherein the at least two electrodes to which the drive signal is applied comprise at least one pressure detection drive electrode and n number of position detection drive electrodes (n is an integer greater than or equal to 1), wherein the at least two electrodes for receiving the plurality of signals comprise at least one pressure detection receiving electrode and m number of position detection receiving electrodes (m is an integer greater than or equal to 1), and wherein the drive unit applies the drive signal to the n number of the position detection drive electrodes during a predetermined time interval and applies the drive signal to the at least one pressure detection drive electrode during a different time interval from the predetermined time interval.
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August 1, 2016
March 3, 2020
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